Quake Finished in 52 Minutes with 100% Completion

Many of you may have seen this video, but there's nothing else going on today, so I'm posting this here because it is awesome. This is a stitched video of every level of Quake being completed at 100%, meaning all kills and all secrets on every level on Nightmare difficulty (via Reddit).

Now, each level was recorded separately and some hacking tools were used to start the next level with the previous level's inventory, but there was no hacking or cheating in the actual level runs. Ten players contributed runs to the project.